Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o valor de jardas corridas por jogo se a temporada for 1984?
 ###Tabelas: CREATE TABLE league_round (league_round_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Played INT, Drawn INT, Lost INT, Points INT) CREATE TABLE season_2:_1998 (season_2:_1998_id AUTO_INCREMENT PRIMARY KEY, Episode # VARCHAR, Title VARCHAR, Directed by VARCHAR, Written by VARCHAR, Original airdate VARCHAR) CREATE TABLE season_by_season_statistics (season_by_season_statistics_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Points per Game VARCHAR, Total Yards per Game VARCHAR, Rushing Yards per Game VARCHAR, Passing Yards per Game VARCHAR, Sacks VARCHAR, Interceptions VARCHAR) CREATE TABLE shipyards_in_the_program (shipyards_in_the_program_id AUTO_INCREMENT PRIMARY KEY, Yard Name VARCHAR, Location (City, State) VARCHAR, 1st Ship Delivery Date VARCHAR, Ship Types Delivered VARCHAR, Total Number of Ways VARCHAR, Total Vessels Built for USMC VARCHAR) CREATE TABLE 2008_rankings (2008_rankings_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Team VARCHAR, Country VARCHAR, Value ($M) INT, Debt as %of value INT, % change on year VARCHAR, Revenue ($M) INT, Operating income($m) INT)  
SELECT Rushing Yards per Game FROM season_by_season_statistics WHERE Season = 1984